Add BAEL-1919 embedded MongoDB test samples (#4580)

spring-boot/src/test/java/com/baeldung/mongodb/ManualEmbeddedMongoDbIntegrationTest.java

@@ -0,0 +1,62 @@
+package com.baeldung.mongodb;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.data.mongodb.core.MongoTemplate;
+
+import com.mongodb.BasicDBObjectBuilder;
+import com.mongodb.DBObject;
+import com.mongodb.MongoClient;
+
+import de.flapdoodle.embed.mongo.MongodExecutable;
+import de.flapdoodle.embed.mongo.MongodStarter;
+import de.flapdoodle.embed.mongo.config.IMongodConfig;
+import de.flapdoodle.embed.mongo.config.MongodConfigBuilder;
+import de.flapdoodle.embed.mongo.config.Net;
+import de.flapdoodle.embed.mongo.distribution.Version;
+import de.flapdoodle.embed.process.runtime.Network;
+
+class ManualEmbeddedMongoDbIntegrationTest {
+    private MongodExecutable mongodExecutable;
+    private MongoTemplate mongoTemplate;
+
+    @AfterEach
+    void clean() {
+        mongodExecutable.stop();
+    }
+
+    @BeforeEach
+    void setup() throws Exception {
+        String ip = "localhost";
+        int port = 27017;
+
+        IMongodConfig mongodConfig = new MongodConfigBuilder().version(Version.Main.PRODUCTION)
+            .net(new Net(ip, port, Network.localhostIsIPv6()))
+            .build();
+
+        MongodStarter starter = MongodStarter.getDefaultInstance();
+        mongodExecutable = starter.prepare(mongodConfig);
+        mongodExecutable.start();
+        mongoTemplate = new MongoTemplate(new MongoClient(ip, port), "test");
+    }
+
+    @DisplayName("Given object When save object using MongoDB template Then object can be found")
+    @Test
+    void test() throws Exception {
+        // given
+        DBObject objectToSave = BasicDBObjectBuilder.start()
+            .add("key", "value")
+            .get();
+
+        // when
+        mongoTemplate.save(objectToSave, "collection");
+
+        // then
+        assertThat(mongoTemplate.findAll(DBObject.class, "collection")).extracting("key")
+            .containsOnly("value");
+    }
+}

spring-boot/src/test/java/com/baeldung/mongodb/MongoDbSpringIntegrationTest.java

@@ -0,0 +1,36 @@
+package com.baeldung.mongodb;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.data.mongo.DataMongoTest;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import com.mongodb.BasicDBObjectBuilder;
+import com.mongodb.DBObject;
+
+@ContextConfiguration(classes = Application.class)
+@DataMongoTest
+@ExtendWith(SpringExtension.class)
+public class MongoDbSpringIntegrationTest {
+    @DisplayName("Given object When save object using MongoDB template Then object can be found")
+    @Test
+    public void test(@Autowired MongoTemplate mongoTemplate) {
+        // given
+        DBObject objectToSave = BasicDBObjectBuilder.start()
+            .add("key", "value")
+            .get();
+
+        // when
+        mongoTemplate.save(objectToSave, "collection");
+
+        // then
+        assertThat(mongoTemplate.findAll(DBObject.class, "collection")).extracting("key")
+            .containsOnly("value");
+    }
+}